Improving the energy efficiency of two-speed motors through the use of new pole-switched windings
Issabekov Z. Rismukhamedov D. Shamsutdionov K. Husanov S. Rismukhamedov S. Issabekova B. Zhantlessova A.
March 2026Institute of Advanced Engineering and Science
International Journal of Power Electronics and Drive Systems
2026#17Issue 1195 - 210 pp.
This article addresses the design and manufacturing of two-speed asynchronous motors with pole-changing windings. The need for developing two-speed motors with a single pole-changing winding is justified from the standpoint of energy and resource efficiency, as well as improved starting performance of high-power electric drives. An analysis of existing pole-changing winding designs is presented, highlighting their practical limitations in industrial applications. A new pole-changing winding with a 4/2 pole ratio and 48 stator slots was developed using the discrete spatial functions method based on star-delta-double star configurations. The electromagnetic characteristics of the proposed winding were analyzed. Based on this design, a new 4A200L8/4U3 two-speed motor was manufactured and tested under production conditions at the energy motors plant. Experimental results show that at p1 = 4 pole pairs the motor delivers P2 = 20 kW with efficiency η= 87, cosφ= 0.82, I1 = 43 A at slip s = 2.35, while at p2 = 2 pole pairs it develops P2 = 36 kW with efficiency η= 91.5, cosφ= 0.906, I1 = 66 A at slip s = 1.5. The results confirm more efficient utilization of the active magnetic core at lower polarity and demonstrate the feasibility of implementing such motors for energy-saving applications in heavy-duty drives requiring two equivalent operating speeds.
Basic scheme , Groove , Layer , Magnetic core , Motor , Two-speed , Winding
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Department of Automation and Control, Faculty of Energy, Toraighyrov University, Pavlodar, Kazakhstan
Department of Power Engineering and Mechanical Engineering, Faculty of Energy, Almalyk branch of Islam Karimov Tashkent State Technical University, Almalyk, Uzbekistan
Department of Electric Power Stations, Networks and Systems, Faculty of Energy, Islam Karimov Tashkent State Technical University, Tashkent, Uzbekistan
Department of Electrical Engineering, Faculty of Energy, Islam Karimov Tashkent State Technical University, Tashkent, Uzbekistan
Department of Operation of Electrical Equipment, Faculty of Energy, S.Seifullin Kazakh Agro Technical Research University, Astana, Kazakhstan
Department of Automation and Control
Department of Power Engineering and Mechanical Engineering
Department of Electric Power Stations
Department of Electrical Engineering
Department of Operation of Electrical Equipment
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